195139895 has 4 divisors (see below), whose sum is σ = 234167880. Its totient is φ = 156111912.

The previous prime is 195139883. The next prime is 195139897. The reversal of 195139895 is 598931591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 598931591 = 331 ⋅1809461.

It is a cyclic number.

It is not a de Polignac number, because 195139895 - 2⁸ = 195139639 is a prime.

It is a super-2 number, since 2×195139895² = 76159157241222050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195139897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19513985 + ... + 19513994.

It is an arithmetic number, because the mean of its divisors is an integer number (58541970).

Almost surely, 2^195139895 is an apocalyptic number.

195139895 is a deficient number, since it is larger than the sum of its proper divisors (39027985).

195139895 is an equidigital number, since it uses as much as digits as its factorization.

195139895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39027984.

The product of its digits is 437400, while the sum is 50.

The square root of 195139895 is about 13969.2481902213. The cubic root of 195139895 is about 580.0276393884.

The spelling of 195139895 in words is "one hundred ninety-five million, one hundred thirty-nine thousand, eight hundred ninety-five".